User Guide

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Chapter 4: BIOS Setup
CPU C states [Enabled]
Allows you to enable or disable the CPU C states.
Congurationoptions:[Disabled][Enabled]
The following items appear only when you set the CPU C states to
[Enabled]
.
Enhanced C-States [Enabled]
This item allows you to enable or disable C1E. When enabled,CPUwillswitchto
minimum speed when all cores enter C-State.
Congurationoptions:[Disabled][Enabled]
C-State Auto Demotion [C1 and C3]
Allows you to enable or disable the Auto Demotion of C-State.
Congurationoptions:[Disabled][C1][C3][C1andC3]
C-State Un-demotion [C1 and C3]
Allows you to enable or disable the Un-demotion of C-State.
Congurationoptions:[Disabled][C1][C3][C1andC3]
Package C state demotion [Disabled]
AllowsyoutoenableordisablethePackageCstatedemotion.
Congurationoptions:[Disabled][Enabled]
Package C state undemotion [Disabled]
AllowsyoutoenableordisablethePackageCstateundemotion.
Congurationoptions:[Disabled][Enabled]
CState Pre-Wake [Enabled]
AllowsyoutoenableordisabletheCStatePre-Wake.Selecting
[Disabled]
will set bit 30 of
POWER_CTLMSR(0x1FC)to1todisabletheCStatePre-Wake.
Congurationoptions:[Disabled][Enabled]
Package C State limit [AUTO]
AllowsyousetthePackageCStatelimit.
Congurationoptions:[C0/C1][C2][C3]C6][C7][C7s][C8][AUTO]
CFG lock [Enabled]
AllowsyoutocongureMSR0xE2[15],CFGlockbit.
Congurationoptions:[Disabled][Enabled]
Intel TXT(LT) Support [Disabled]
AllowsyoutoenableordisabletheIntel(R)TXT(LT)support.
Congurationoptions:[Disabled][Enabled]